ACF

ACF is a three-letter acronym that may refer to:Social welfare organizationsAnti Cornish Front, an organization that opposes Cornwall being part of England & The British Isles Academic Competition Federation, a non-profit organization that promotes academic quiz tournaments in the United StatesAction Against Hunger (Action Contre la Faim), an international non-profit, non-governmental organization that fights against hungerAdministration for Children and Families, an operating unit of United States Department of Health and Human ServicesAfrican Conservation Foundation, an organization that works towards the protection and conservation of Africa's endangered wildlife and their habitatsAustralian Conservation Foundation, an Australian non-profit organization that promotes ecologically sustainability
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French Automobile Club, organization that provides its members with emergency road assistance (towing, etc.) and other automobile services (maps, travel planning, etc.)

Advanced Communications Function

[As of 1992] The planned 23 facilities that result from consolidation of existing Air Route Traffic Control Center (ARTCC) and Terminal Radar Approach Control (TRACON)/Terminal Radar Approach Control in Tower Cab (TRACAB) facilities. An Area Control Facility (ACF) may be formed from an existing ARTCC or may be created in a new building. The number, location, and implementation dates of ACFs are in accordance with the National Airspace System Plan. There will be 20 Continental U.S. (CONUS) ACFs converted from ARTCCs; plus Honolulu, Anchorage, and the New York TRACON. Each can accomplish an en route and approach/departure control. (FAA8) 

Area Control Facility